The UK National Cyber Security Centre (NCSC) conducted an extensive security analysis of the UK telecommunications sector as part of the DCMS Supply Chain Review initiated in 2018. This analysis resulted in technical recommendations aimed at improving the security posture of the telecom sector, including formal advice on the use of High Risk Vendors (HRVs). The summary document outlines the technical security analysis underpinning these recommendations but does not specify individual vulnerabilities or exploits. No known exploits in the wild have been reported related to this analysis. The severity of the findings is assessed as medium.
